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WARRANTY COSTS AND OTHER CONTINGENCIES - Analysis of warranty accruals (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Warranty accruals:    
Balance at beginning of year $ 4,641 $ 5,030
Less: Payments made during the year (3,600) (2,880)
Add: Warranty provision for the current year 3,950 2,707
Changes to warranty provision for prior years 145 207
Balance at end of year $ 5,136 $ 5,064